observation?

patulong po plss​

Answer:

(b) 490 N downwards

Explanation:

(b) Formula : w= mg

m is the mass of the object

g is a gravitational constant (9.8)

w= mg

= 50×9.8

= 490 N downwards

Answer:

the answer is 6.25

Explanation:

Answer:

16/100 = 4/25

Explanation:

The given are 10 ohms 20 ohms and 100 ohms.

The formula for getting the parallel circuit is 1/r1 + 1/r2 + 1/r3 (the denominators are the given)

Then we calculate, Rp=1/10+1/20+1/100=10/100+5/100+1/100=16/100

Answer:

d = 493.72 m

Explanation:

Given that,

Initial velocity of the train, u = 80 km/h = 22.22 m/s

Acceleration of the train, a = -0.5 m/s² (negative as it slows down)

Finally brakes are applied, v = 0

We need to find the distance the train travels. Let the distance be d. Using third equation of kinematics to find it.

[tex]v^2-u^2=2ad\\\\d=\dfrac{v^2-u^2}{2a}\\\\d=\dfrac{0^2-(22.22)^2}{2\times (-0.5)}\\\\d=493.72\ m[/tex]

So, the required distance is equal to 493.72 m.

Answer:

go for a walk/run

pace while texting/calling someone

park further away

take the stairs instead of the elevator

get up and get something frequently, or move between rooms frequently

Answer:

Explanation:

The amount of force needed needs to be greater than all the forces acting in the opposite direction that the bowling ball was thrown. This includes air resistance, floor friction, gravity, and any other force involved. As long as the force acting on the bowling ball that is causing it to go in the direction of the pins is slightly greater than the opposite acting forces then it will continue in that direction. Since no values are provided we cannot calculate the actual precise value of force needed.

Answer: one of the things that determinates something is a planet and not a star is that planets are constanlty moving around the sun while stars are "still"

Explanation:

Answer:

1. It must orbit a star (in our cosmic neighborhood, the Sun).

2. It must be big enough that its gravity cleared away any other objects of a similar size near its orbit around the Sun.

Explanation:

I hope this helps!

Answer: [tex]37.28^{\circ}[/tex]

Explanation:

Given

Angle made with the x-axis is [tex]\alpha=70^{\circ}[/tex]

Angle made with the y-axis is [tex]\beta=60^{\circ}[/tex]

Suppose angle made with z-axis is [tex]\gamma[/tex]

[tex]\therefore \cos^2\alpha+\cos^2\beta+\cos^2\gamma =1[/tex]

Inserting values

[tex]\Rightarrow \cos^2(70^{\circ})+\cos^2(60^{\circ})+\cos^2\gamma=1\\\Rightarrow 0.1169+0.25+\cos^2\gamma=1\\\Rightarrow \cos^2\gamma=0.6331\\\Rightarrow \cos \gamma=0.7956\\\Rightarrow \gamma=37.28^{\circ}[/tex]

Answer:

please give me brainlist and follow

Explanation:

As the projectile moves upward, its vertical component of velocity decreases due to gravity. While the horizontal component remains the same as there is no acceleration in the horizontal direction. At maximum height vertical component of velocity is zero.

Ignoring air resistance, an object thrown in any direction moves in a parabolic path from the time it leaves the thrower's hand until the time it hits the ground or a physical obstruction.

Answer:

4

Explanation:

Velocity ratio is the ratio of distance moved by effort to the ratio of distance moved by load

Velocity ratio = Distance moved by effort / Distance moved by load

Distance moved by effort = 20m

Distance moved by load = 5m

20m / 5m = 4

Answer:

151.2 m/s

Explanation:

m1 = 0.020 kg

m2 = 2.5 kg

vf = 1.2 m/s

m1v1 +m2v2 = (m1 +m2)vf

0.020v1 + 0 = (0.020 +2.5)(1.2)

---> 151.2 m/s

Answer:

When one light in the circuit burns out, the rest of the lights will go out.

Explanation:

When one light goes out, and the current is broken. Causing all remaining lights to go out as well.

Answer:

the small one will have greater acceleration

Explanation:

force and mass are inversely proportional. force and acceleration are directly proportional. which means greater mass have smaller acceleration and smaller mass has greater acceleration. this is due to newtons second law of motion.

The small object will have greater acceleration as compared to a heavy truck if we push with the same amount of force, i.e., 7000 N.

Acceleration is proportional to change in velocity.

When there will be a change in velocity with time, that is called acceleration.

[tex]\vec{a}[/tex]=[tex]\vec{dv}/dt[/tex] where,

[tex]\vec{a}[/tex] is the acceleration,

[tex]\vec{dv}[/tex] is the change in velocity and,

dt is change in time.

It is a vector quantity.

SI unit of acceleration is [tex]m/s^{2}[/tex].

There are several types of acceleration :

As we know that acceleration depends on the change in velocity and velocity of a body depends on the mass of the body. So if the body has less mass it must have a higher velocity and if it has a higher velocity than it has  greater acceleration.

Hence, the small object/body has greater acceleration as compared to a heavy truck.

For more information about Acceleration :

https://brainly.com/question/12550364

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Answer:

1600 N

Explanation:

F-F' = ma.................. Equation 1

Where F = Force exerted by the engine, F' = Frictional Force, m = mass of the car, a = acceleration of the car.

make F' the subject of the equation

F' = F-ma............... Equation 2

Given: F = 1600 N, m = 880 kg, a = 0 m/s (moving with a constant velocity).

Substitite these values into equation 2

F' = 1600+880(0)

F' = 1600 N.

Answer:

This is false.

Explanation:

No; you cannot change the formulas of individual substances because the chemical formula for a given substance is characteristic of that substance. What you can do, however, is to change the number of molecules that react or are produced.

Answer:

b

Explanation:

the solar system is smaller then nebula nebula is smaller then a galaxie and a galaxie is smaller then a universe

Sample Response: If resistance in a circuit is increased under constant voltage, then current must decrease because Ohm's law states that resistance and current are inversely proportional.

edge 2021

Answer:

If resistance in a circuit is increased under constant voltage, then current must decrease because Ohm's law states that resistance and current are inversely proportional.

Explanation:

edge 2021

Answer:

C. Changes mechanical energy to electrical

Answer:

A,C and D

Explanation:

Answer:

71344 J

Explanation:

From the law of conservation of energy,

Mechanical Energy = Kinetic Energy + Potential Energy

M.E = (mv²/2)+ mgh.................... Equation 1

Where M.E = Mechanical Energy, m = mass, v = Velocity, h = height, g = acceleration due to gravity.

Given: m = 52 kg, v = 28 m/s, h = 100 m (half way down the ski jump)

Constant: g = 9.8 m/s²

Substitute these values into equation 1

M.E = (52×28²/2) + (52×100×9.8)

M.E = 20384+50960

M.E = 71344 J

Answer:

Differences

similarities

wave length and wave speed will remain the same

Explanation:

A wave  generated by Oscillation and paused at two different times will maintain certain characteristics at all times while some characteristics will differ along the wave as it it paused

The differences in the characteristics of the wave at different time ( i.e. at paused and unpaused times )

similarities :

wave length and wave speed will remain the same

Answer: e) turbidity​

Explanation:

Evaporation is  defined as the process by which a liquid without being heated is converted into vapor.

The factors that affect the rate of evaporation of a liquid are:

a) humidity-When the humidity of an environment is high, it will take more time for water to escape to the atmosphere and less time, if the reverse is the case because Humidity is the amount of water vapor in the atmosphere. For example, on a rainy day, clothes tend to dry slower than a sunny day.

b) nature of liquid- different liquids have different rate of evaporation, For example, alcohol will evaporate faster than water

c) pressure - The higher the pressure  on the surface of a body of water, the slower the  evaporation rate and vice versa.

d) temperature- The temperature of a surrounding affect how fast a liquid ,(water) can evaporate. When the temperature of the liquid  is increased, it raises the kinetic energy of the individual molecules that make up the liquid thereby reducing the inter molecular forces of attraction holding the liquid together and causing fast  escape into the atmosphere as a vapor or gas

e) turbidity​  shows the extent water loses its transparency due to the presence of suspended particles lie clay, silt, organic matter etc and so is not a factor that affect rate of evapouration

Answer:

The correct answer is "0.32 mL".

Explanation:

The given values are:

Density of gold bar,

d = 19.3 g/mL

Mass of gold bar,

m = 6.3 grams

Now,

The volume will be:

⇒  [tex]Density = \frac{Mass}{Volume}[/tex]

or,

⇒  [tex]Volume=\frac{Mass}{Density}[/tex]

On substituting the values, we get

⇒               [tex]=\frac{6.3 \ g}{19.3 \ g/mL}[/tex]

⇒               [tex]=0.32 \ mL[/tex]

Answer:

Explanation:you knoe i know

Answer:

4

Explanation:

2*2

www.omnicalculator.com/physics/wavelength

Answer:

I. 56

II. c is the speed of light in vacuum.

III. 385.180×10¯²⁷ Kg.

Explanation:

I. Determination of the value of p.

²³⁸₉₂U + ¹₀n —> ¹³⁹ₚBa + ⁹⁷₃₆Kr + 3 ¹₀n

92 + 0 = p + 36 + 3(0)

92 = p + 36

Collect like terms

92 – 36 = p

56 = p

Therefore, the value of p is 56

II. Determination of the meaning of c

ΔE = Δmc²

In the Einstein's equation above,

E => is the energy

m => is the mass

c => is the speed of light in vacuum.

III. Determination of the total mass of the element formed after the reaction.

From the reaction above, the elements formed after the reaction are:

Barium–139 and Krypton–97. Thus, we can obtain the total mass of the elements formed as follow:

Mass of Ba–139 = 232.560×10¯²⁷ Kg

Mass of Kr–97 = 152.620×10¯²⁷ Kg

Total mass =?

Total mass = mass of Ba–139 + mass of Kr–97

Total mass = 232.560×10¯²⁷ + 152.620×10¯²⁷

Total mass = 385.180×10¯²⁷ Kg